[U-Boot] [PATCH 1/2] TI: netdev: add driver for cpsw ethernet device
Chandan Nath
chandan.nath at ti.com
Fri Oct 21 09:02:57 CEST 2011
From: Cyril Chemparathy <cyril at ti.com>
CPSW is an on-chip ethernet switch that is found on various SoCs from Texas
Instruments. This patch adds a simple driver (based on the Linux driver) for
this hardware module.
Signed-off-by: Cyril Chemparathy <cyril at ti.com>
---
drivers/net/Makefile | 1 +
drivers/net/cpsw.c | 862 ++++++++++++++++++++++++++++++++++++++++++++++++++
include/netdev.h | 29 ++
3 files changed, 892 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/cpsw.c
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 819b197..080f767 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -80,6 +80,7 @@ COBJS-$(CONFIG_TIGON3) += bcm570x_autoneg.o
COBJS-$(CONFIG_TIGON3) += 5701rls.o
COBJS-$(CONFIG_DRIVER_TI_EMAC) += davinci_emac.o
COBJS-$(CONFIG_TSEC_ENET) += tsec.o fsl_mdio.o
+COBJS-$(CONFIG_DRIVER_TI_CPSW) += cpsw.o
COBJS-$(CONFIG_TSI108_ETH) += tsi108_eth.o
COBJS-$(CONFIG_ULI526X) += uli526x.o
COBJS-$(CONFIG_VSC7385_ENET) += vsc7385.o
diff --git a/drivers/net/cpsw.c b/drivers/net/cpsw.c
new file mode 100644
index 0000000..4cef4cf
--- /dev/null
+++ b/drivers/net/cpsw.c
@@ -0,0 +1,862 @@
+/*
+ * CPSW Ethernet Switch Driver
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <miiphy.h>
+#include <malloc.h>
+#include <net.h>
+#include <netdev.h>
+#include <asm/errno.h>
+#include <asm/io.h>
+#include <linux/mii.h>
+
+#define BIT(x) (1 << (x))
+#define BITMASK(bits) (BIT(bits) - 1)
+#define PHY_REG_MASK 0x1f
+#define PHY_ID_MASK 0x1f
+#define NUM_DESCS (PKTBUFSRX * 2)
+#define PKT_MIN 60
+#define PKT_MAX (1500 + 14 + 4 + 4)
+
+/* DMA Registers */
+#define CPDMA_TXCONTROL 0x004
+#define CPDMA_RXCONTROL 0x014
+#define CPDMA_SOFTRESET 0x01c
+#define CPDMA_RXFREE 0x0e0
+#define CPDMA_TXHDP 0x100
+#define CPDMA_RXHDP 0x120
+#define CPDMA_TXCP 0x140
+#define CPDMA_RXCP 0x160
+
+/* Descriptor mode bits */
+#define CPDMA_DESC_SOP BIT(31)
+#define CPDMA_DESC_EOP BIT(30)
+#define CPDMA_DESC_OWNER BIT(29)
+#define CPDMA_DESC_EOQ BIT(28)
+
+struct cpsw_mdio_regs {
+ u32 version;
+ u32 control;
+#define CONTROL_IDLE (1 << 31)
+#define CONTROL_ENABLE (1 << 30)
+
+ u32 alive;
+ u32 link;
+ u32 linkintraw;
+ u32 linkintmasked;
+ u32 __reserved_0[2];
+ u32 userintraw;
+ u32 userintmasked;
+ u32 userintmaskset;
+ u32 userintmaskclr;
+ u32 __reserved_1[20];
+
+ struct {
+ u32 access;
+ u32 physel;
+#define USERACCESS_GO (1 << 31)
+#define USERACCESS_WRITE (1 << 30)
+#define USERACCESS_ACK (1 << 29)
+#define USERACCESS_READ (0)
+#define USERACCESS_DATA (0xffff)
+ } user[0];
+};
+
+struct cpsw_regs {
+ u32 id_ver;
+ u32 control;
+ u32 soft_reset;
+ u32 stat_port_en;
+ u32 ptype;
+};
+
+struct cpsw_slave_regs {
+ u32 max_blks;
+ u32 blk_cnt;
+ u32 flow_thresh;
+ u32 port_vlan;
+ u32 tx_pri_map;
+ u32 gap_thresh;
+ u32 sa_lo;
+ u32 sa_hi;
+};
+
+struct cpsw_host_regs {
+ u32 max_blks;
+ u32 blk_cnt;
+ u32 flow_thresh;
+ u32 port_vlan;
+ u32 tx_pri_map;
+ u32 cpdma_tx_pri_map;
+ u32 cpdma_rx_chan_map;
+};
+
+struct cpsw_sliver_regs {
+ u32 id_ver;
+ u32 mac_control;
+ u32 mac_status;
+ u32 soft_reset;
+ u32 rx_maxlen;
+ u32 __reserved_0;
+ u32 rx_pause;
+ u32 tx_pause;
+ u32 __reserved_1;
+ u32 rx_pri_map;
+};
+
+#define ALE_ENTRY_BITS 68
+#define ALE_ENTRY_WORDS DIV_ROUND_UP(ALE_ENTRY_BITS, 32)
+
+/* ALE Registers */
+#define ALE_CONTROL 0x08
+#define ALE_UNKNOWNVLAN 0x18
+#define ALE_TABLE_CONTROL 0x20
+#define ALE_TABLE 0x34
+#define ALE_PORTCTL 0x40
+
+#define ALE_TABLE_WRITE BIT(31)
+
+#define ALE_TYPE_FREE 0
+#define ALE_TYPE_ADDR 1
+#define ALE_TYPE_VLAN 2
+#define ALE_TYPE_VLAN_ADDR 3
+
+#define ALE_UCAST_PERSISTANT 0
+#define ALE_UCAST_UNTOUCHED 1
+#define ALE_UCAST_OUI 2
+#define ALE_UCAST_TOUCHED 3
+
+#define ALE_MCAST_FWD 0
+#define ALE_MCAST_BLOCK_LEARN_FWD 1
+#define ALE_MCAST_FWD_LEARN 2
+#define ALE_MCAST_FWD_2 3
+
+enum cpsw_ale_port_state {
+ ALE_PORT_STATE_DISABLE = 0x00,
+ ALE_PORT_STATE_BLOCK = 0x01,
+ ALE_PORT_STATE_LEARN = 0x02,
+ ALE_PORT_STATE_FORWARD = 0x03,
+};
+
+/* ALE unicast entry flags - passed into cpsw_ale_add_ucast() */
+#define ALE_SECURE 1
+#define ALE_BLOCKED 2
+
+struct cpsw_slave {
+ struct cpsw_slave_regs *regs;
+ struct cpsw_sliver_regs *sliver;
+ int slave_num;
+ u32 mac_control;
+ struct cpsw_slave_data *data;
+};
+
+struct cpdma_desc {
+ /* hardware fields */
+ u32 hw_next;
+ u32 hw_buffer;
+ u32 hw_len;
+ u32 hw_mode;
+ /* software fields */
+ u32 sw_buffer;
+ u32 sw_len;
+};
+
+struct cpdma_chan {
+ struct cpdma_desc *head, *tail;
+ void *hdp, *cp, *rxfree;
+};
+
+#define desc_write(desc, fld, val) __raw_writel((u32)(val), &(desc)->fld)
+#define desc_read(desc, fld) __raw_readl(&(desc)->fld)
+#define desc_read_ptr(desc, fld) ((void *)__raw_readl(&(desc)->fld))
+
+#define chan_write(chan, fld, val) __raw_writel((u32)(val), (chan)->fld)
+#define chan_read(chan, fld) __raw_readl((chan)->fld)
+#define chan_read_ptr(chan, fld) ((void *)__raw_readl((chan)->fld))
+
+struct cpsw_priv {
+ struct eth_device *dev;
+ struct cpsw_platform_data data;
+ int host_port;
+
+ struct cpsw_regs *regs;
+ void *dma_regs;
+ struct cpsw_host_regs *host_port_regs;
+ void *ale_regs;
+
+ struct cpdma_desc descs[NUM_DESCS];
+ struct cpdma_desc *desc_free;
+ struct cpdma_chan rx_chan, tx_chan;
+
+ struct cpsw_slave *slaves;
+#define for_each_slave(priv, func, arg...) \
+ do { \
+ int idx; \
+ for (idx = 0; idx < (priv)->data.slaves; idx++) \
+ (func)((priv)->slaves + idx, ##arg); \
+ } while (0)
+};
+
+static inline int cpsw_ale_get_field(u32 *ale_entry, u32 start, u32 bits)
+{
+ int idx;
+
+ idx = start / 32;
+ start -= idx * 32;
+ idx = 2 - idx; /* flip */
+ return (ale_entry[idx] >> start) & BITMASK(bits);
+}
+
+static inline void cpsw_ale_set_field(u32 *ale_entry, u32 start, u32 bits,
+ u32 value)
+{
+ int idx;
+
+ value &= BITMASK(bits);
+ idx = start / 32;
+ start -= idx * 32;
+ idx = 2 - idx; /* flip */
+ ale_entry[idx] &= ~(BITMASK(bits) << start);
+ ale_entry[idx] |= (value << start);
+}
+
+#define DEFINE_ALE_FIELD(name, start, bits) \
+static inline int cpsw_ale_get_##name(u32 *ale_entry) \
+{ \
+ return cpsw_ale_get_field(ale_entry, start, bits); \
+} \
+static inline void cpsw_ale_set_##name(u32 *ale_entry, u32 value) \
+{ \
+ cpsw_ale_set_field(ale_entry, start, bits, value); \
+}
+
+DEFINE_ALE_FIELD(entry_type, 60, 2)
+DEFINE_ALE_FIELD(mcast_state, 62, 2)
+DEFINE_ALE_FIELD(port_mask, 64, 3)
+DEFINE_ALE_FIELD(ucast_type, 66, 2)
+DEFINE_ALE_FIELD(port_num, 64, 2)
+DEFINE_ALE_FIELD(blocked, 63, 1)
+DEFINE_ALE_FIELD(secure, 62, 1)
+DEFINE_ALE_FIELD(mcast, 47, 1)
+
+/* The MAC address field in the ALE entry cannot be macroized as above */
+static inline void cpsw_ale_get_addr(u32 *ale_entry, u8 *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ addr[i] = cpsw_ale_get_field(ale_entry, 40 - 8*i, 8);
+}
+
+static inline void cpsw_ale_set_addr(u32 *ale_entry, u8 *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ cpsw_ale_set_field(ale_entry, 40 - 8*i, 8, addr[i]);
+}
+
+static int cpsw_ale_read(struct cpsw_priv *priv, int idx, u32 *ale_entry)
+{
+ int i;
+
+ __raw_writel(idx, priv->ale_regs + ALE_TABLE_CONTROL);
+
+ for (i = 0; i < ALE_ENTRY_WORDS; i++)
+ ale_entry[i] = __raw_readl(priv->ale_regs + ALE_TABLE + 4 * i);
+
+ return idx;
+}
+
+static int cpsw_ale_write(struct cpsw_priv *priv, int idx, u32 *ale_entry)
+{
+ int i;
+
+ for (i = 0; i < ALE_ENTRY_WORDS; i++)
+ __raw_writel(ale_entry[i], priv->ale_regs + ALE_TABLE + 4 * i);
+
+ __raw_writel(idx | ALE_TABLE_WRITE, priv->ale_regs + ALE_TABLE_CONTROL);
+
+ return idx;
+}
+
+static int cpsw_ale_match_addr(struct cpsw_priv *priv, u8* addr)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < priv->data.ale_entries; idx++) {
+ u8 entry_addr[6];
+
+ cpsw_ale_read(priv, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+ if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+ continue;
+ cpsw_ale_get_addr(ale_entry, entry_addr);
+ if (memcmp(entry_addr, addr, 6) == 0)
+ return idx;
+ }
+ return -ENOENT;
+}
+
+static int cpsw_ale_match_free(struct cpsw_priv *priv)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < priv->data.ale_entries; idx++) {
+ cpsw_ale_read(priv, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+ if (type == ALE_TYPE_FREE)
+ return idx;
+ }
+ return -ENOENT;
+}
+
+static int cpsw_ale_find_ageable(struct cpsw_priv *priv)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS];
+ int type, idx;
+
+ for (idx = 0; idx < priv->data.ale_entries; idx++) {
+ cpsw_ale_read(priv, idx, ale_entry);
+ type = cpsw_ale_get_entry_type(ale_entry);
+ if (type != ALE_TYPE_ADDR && type != ALE_TYPE_VLAN_ADDR)
+ continue;
+ if (cpsw_ale_get_mcast(ale_entry))
+ continue;
+ type = cpsw_ale_get_ucast_type(ale_entry);
+ if (type != ALE_UCAST_PERSISTANT &&
+ type != ALE_UCAST_OUI)
+ return idx;
+ }
+ return -ENOENT;
+}
+
+static int cpsw_ale_add_ucast(struct cpsw_priv *priv, u8 *addr,
+ int port, int flags)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx;
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+ cpsw_ale_set_addr(ale_entry, addr);
+ cpsw_ale_set_ucast_type(ale_entry, ALE_UCAST_PERSISTANT);
+ cpsw_ale_set_secure(ale_entry, (flags & ALE_SECURE) ? 1 : 0);
+ cpsw_ale_set_blocked(ale_entry, (flags & ALE_BLOCKED) ? 1 : 0);
+ cpsw_ale_set_port_num(ale_entry, port);
+
+ idx = cpsw_ale_match_addr(priv, addr);
+ if (idx < 0)
+ idx = cpsw_ale_match_free(priv);
+ if (idx < 0)
+ idx = cpsw_ale_find_ageable(priv);
+ if (idx < 0)
+ return -ENOMEM;
+
+ cpsw_ale_write(priv, idx, ale_entry);
+ return 0;
+}
+
+static int cpsw_ale_add_mcast(struct cpsw_priv *priv, u8 *addr, int port_mask)
+{
+ u32 ale_entry[ALE_ENTRY_WORDS] = {0, 0, 0};
+ int idx, mask;
+
+ idx = cpsw_ale_match_addr(priv, addr);
+ if (idx >= 0)
+ cpsw_ale_read(priv, idx, ale_entry);
+
+ cpsw_ale_set_entry_type(ale_entry, ALE_TYPE_ADDR);
+ cpsw_ale_set_addr(ale_entry, addr);
+ cpsw_ale_set_mcast_state(ale_entry, ALE_MCAST_FWD_2);
+
+ mask = cpsw_ale_get_port_mask(ale_entry);
+ port_mask |= mask;
+ cpsw_ale_set_port_mask(ale_entry, port_mask);
+
+ if (idx < 0)
+ idx = cpsw_ale_match_free(priv);
+ if (idx < 0)
+ idx = cpsw_ale_find_ageable(priv);
+ if (idx < 0)
+ return -ENOMEM;
+
+ cpsw_ale_write(priv, idx, ale_entry);
+ return 0;
+}
+
+static inline void cpsw_ale_control(struct cpsw_priv *priv, int bit, int val)
+{
+ u32 tmp, mask = BIT(bit);
+
+ tmp = __raw_readl(priv->ale_regs + ALE_CONTROL);
+ tmp &= ~mask;
+ tmp |= val ? mask : 0;
+ __raw_writel(tmp, priv->ale_regs + ALE_CONTROL);
+}
+
+#define cpsw_ale_enable(priv, val) cpsw_ale_control(priv, 31, val)
+#define cpsw_ale_clear(priv, val) cpsw_ale_control(priv, 30, val)
+#define cpsw_ale_vlan_aware(priv, val) cpsw_ale_control(priv, 2, val)
+
+static inline void cpsw_ale_port_state(struct cpsw_priv *priv, int port,
+ int val)
+{
+ int offset = ALE_PORTCTL + 4 * port;
+ u32 tmp, mask = 0x3;
+
+ tmp = __raw_readl(priv->ale_regs + offset);
+ tmp &= ~mask;
+ tmp |= val & 0x3;
+ __raw_writel(tmp, priv->ale_regs + offset);
+}
+
+static struct cpsw_mdio_regs *mdio_regs;
+
+/* wait until hardware is ready for another user access */
+static inline u32 wait_for_user_access(void)
+{
+ u32 reg;
+
+ while ((reg = __raw_readl(&mdio_regs->user[0].access)) & USERACCESS_GO)
+ ;
+
+ return reg;
+}
+
+/* wait until hardware state machine is idle */
+static inline void wait_for_idle(void)
+{
+ while ((__raw_readl(&mdio_regs->control) & CONTROL_IDLE) == 0)
+ ;
+}
+
+static int cpsw_mdio_read(char *devname, unsigned char phy_id,
+ unsigned char phy_reg, unsigned short *data)
+{
+ u32 reg;
+
+ if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
+ return -EINVAL;
+
+ wait_for_user_access();
+ reg = (USERACCESS_GO | USERACCESS_READ | (phy_reg << 21) |
+ (phy_id << 16));
+ __raw_writel(reg, &mdio_regs->user[0].access);
+ reg = wait_for_user_access();
+
+ *data = (reg & USERACCESS_ACK) ? (reg & USERACCESS_DATA) : -1;
+ return (reg & USERACCESS_ACK) ? 0 : -EIO;
+}
+
+static int cpsw_mdio_write(char *devname, unsigned char phy_id,
+ unsigned char phy_reg, unsigned short data)
+{
+ u32 reg;
+
+ if (phy_reg & ~PHY_REG_MASK || phy_id & ~PHY_ID_MASK)
+ return -EINVAL;
+
+ wait_for_user_access();
+ reg = (USERACCESS_GO | USERACCESS_WRITE | (phy_reg << 21) |
+ (phy_id << 16) | (data & USERACCESS_DATA));
+ __raw_writel(reg, &mdio_regs->user[0].access);
+ wait_for_user_access();
+
+ return 0;
+}
+
+static void cpsw_mdio_init(char *name, u32 mdio_base, u32 div)
+{
+ mdio_regs = (struct cpsw_mdio_regs *)mdio_base;
+
+ /* set enable and clock divider */
+ __raw_writel(div | CONTROL_ENABLE, &mdio_regs->control);
+
+ /*
+ * wait for scan logic to settle:
+ * the scan time consists of (a) a large fixed component, and (b) a
+ * small component that varies with the mii bus frequency. These
+ * were estimated using measurements at 1.1 and 2.2 MHz on tnetv107x
+ * silicon. Since the effect of (b) was found to be largely
+ * negligible, we keep things simple here.
+ */
+ udelay(1000);
+
+ miiphy_register(name, cpsw_mdio_read, cpsw_mdio_write);
+}
+
+static inline void soft_reset(void *reg)
+{
+ __raw_writel(1, reg);
+ while (__raw_readl(reg) & 1)
+ ;
+}
+
+#define mac_hi(mac) (((mac)[0] << 0) | ((mac)[1] << 8) | \
+ ((mac)[2] << 16) | ((mac)[3] << 24))
+#define mac_lo(mac) (((mac)[4] << 0) | ((mac)[5] << 8))
+
+static void cpsw_set_slave_mac(struct cpsw_slave *slave,
+ struct cpsw_priv *priv)
+{
+ __raw_writel(mac_hi(priv->dev->enetaddr), &slave->regs->sa_hi);
+ __raw_writel(mac_lo(priv->dev->enetaddr), &slave->regs->sa_lo);
+}
+
+static void cpsw_slave_update_link(struct cpsw_slave *slave,
+ struct cpsw_priv *priv, int *link)
+{
+ char *name = priv->dev->name;
+ int phy_id = slave->data->phy_id;
+ int speed, duplex;
+ unsigned short reg;
+ u32 mac_control = 0;
+
+ if (miiphy_read(name, phy_id, MII_BMSR, ®))
+ return; /* could not read, assume no link */
+
+ if (reg & BMSR_LSTATUS) { /* link up */
+ speed = miiphy_speed(name, phy_id);
+ duplex = miiphy_duplex(name, phy_id);
+
+ *link = 1;
+ mac_control = priv->data.mac_control;
+ if (speed == 1000)
+ mac_control |= BIT(7); /* GIGABITEN */
+ if (duplex == FULL)
+ mac_control |= BIT(0); /* FULLDUPLEXEN */
+ }
+
+ if (mac_control == slave->mac_control)
+ return;
+
+ if (mac_control) {
+ printf("link up on port %d, speed %d, %s duplex\n",
+ slave->slave_num, speed,
+ (duplex == FULL) ? "full" : "half");
+ } else {
+ printf("link down on port %d\n", slave->slave_num);
+ }
+
+ __raw_writel(mac_control, &slave->sliver->mac_control);
+ slave->mac_control = mac_control;
+}
+
+static int cpsw_update_link(struct cpsw_priv *priv)
+{
+ int link = 0;
+ for_each_slave(priv, cpsw_slave_update_link, priv, &link);
+ return link;
+}
+
+static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv)
+{
+ soft_reset(&slave->sliver->soft_reset);
+
+ /* setup priority mapping */
+ __raw_writel(0x76543210, &slave->sliver->rx_pri_map);
+ __raw_writel(0x33221100, &slave->regs->tx_pri_map);
+
+ /* setup max packet size, and mac address */
+ __raw_writel(PKT_MAX, &slave->sliver->rx_maxlen);
+ cpsw_set_slave_mac(slave, priv);
+
+ slave->mac_control = 0; /* no link yet */
+
+ /* enable forwarding */
+ cpsw_ale_port_state(priv, slave->slave_num, ALE_PORT_STATE_FORWARD);
+
+ cpsw_ale_add_mcast(priv, NetBcastAddr, 1 << slave->slave_num);
+
+ priv->data.phy_init(priv->dev->name, slave->data->phy_id);
+}
+
+static struct cpdma_desc *cpdma_desc_alloc(struct cpsw_priv *priv)
+{
+ struct cpdma_desc *desc = priv->desc_free;
+
+ if (desc)
+ priv->desc_free = desc_read_ptr(desc, hw_next);
+ return desc;
+}
+
+static void cpdma_desc_free(struct cpsw_priv *priv, struct cpdma_desc *desc)
+{
+ if (desc) {
+ desc_write(desc, hw_next, priv->desc_free);
+ priv->desc_free = desc;
+ }
+}
+
+static int cpdma_submit(struct cpsw_priv *priv, struct cpdma_chan *chan,
+ volatile void *buffer, int len)
+{
+ struct cpdma_desc *desc, *prev;
+ u32 mode;
+
+ desc = cpdma_desc_alloc(priv);
+ if (!desc)
+ return -ENOMEM;
+
+ if (len < PKT_MIN)
+ len = PKT_MIN;
+
+ mode = CPDMA_DESC_OWNER | CPDMA_DESC_SOP | CPDMA_DESC_EOP;
+
+ desc_write(desc, hw_next, 0);
+ desc_write(desc, hw_buffer, buffer);
+ desc_write(desc, hw_len, len);
+ desc_write(desc, hw_mode, mode | len);
+ desc_write(desc, sw_buffer, buffer);
+ desc_write(desc, sw_len, len);
+
+ if (!chan->head) {
+ /* simple case - first packet enqueued */
+ chan->head = desc;
+ chan->tail = desc;
+ chan_write(chan, hdp, desc);
+ goto done;
+ }
+
+ /* not the first packet - enqueue at the tail */
+ prev = chan->tail;
+ desc_write(prev, hw_next, desc);
+ chan->tail = desc;
+
+ /* next check if EOQ has been triggered already */
+ if (desc_read(prev, hw_mode) & CPDMA_DESC_EOQ)
+ chan_write(chan, hdp, desc);
+
+done:
+ if (chan->rxfree)
+ chan_write(chan, rxfree, 1);
+ return 0;
+}
+
+static int cpdma_process(struct cpsw_priv *priv, struct cpdma_chan *chan,
+ void **buffer, int *len)
+{
+ struct cpdma_desc *desc = chan->head;
+ u32 status;
+
+ if (!desc)
+ return -ENOENT;
+
+ status = desc_read(desc, hw_mode);
+
+ if (len)
+ *len = status & 0x7ff;
+
+ if (buffer)
+ *buffer = desc_read_ptr(desc, sw_buffer);
+
+ if (status & CPDMA_DESC_OWNER)
+ return -EBUSY;
+
+ chan->head = desc_read_ptr(desc, hw_next);
+ chan_write(chan, cp, desc);
+
+ cpdma_desc_free(priv, desc);
+ return 0;
+}
+
+static int cpsw_init(struct eth_device *dev, bd_t *bis)
+{
+ struct cpsw_priv *priv = dev->priv;
+ int i, ret;
+
+ priv->data.control(1);
+
+ /* soft reset the controller and initialize priv */
+ soft_reset(&priv->regs->soft_reset);
+
+ /* initialize and reset the address lookup engine */
+ cpsw_ale_enable(priv, 1);
+ cpsw_ale_clear(priv, 1);
+ cpsw_ale_vlan_aware(priv, 0); /* vlan unaware mode */
+
+ /* setup host port priority mapping */
+ __raw_writel(0x76543210, &priv->host_port_regs->cpdma_tx_pri_map);
+ __raw_writel(0, &priv->host_port_regs->cpdma_rx_chan_map);
+
+ /* disable priority elevation and enable statistics on all ports */
+ __raw_writel(0, &priv->regs->ptype);
+
+ /* enable statistics collection only on the host port */
+ __raw_writel(BIT(priv->host_port), &priv->regs->stat_port_en);
+
+ cpsw_ale_port_state(priv, priv->host_port, ALE_PORT_STATE_FORWARD);
+
+ cpsw_ale_add_ucast(priv, priv->dev->enetaddr, priv->host_port,
+ ALE_SECURE);
+ cpsw_ale_add_mcast(priv, NetBcastAddr, 1 << priv->host_port);
+
+ for_each_slave(priv, cpsw_slave_init, priv);
+
+ cpsw_update_link(priv);
+
+ /* init descriptor pool */
+ for (i = 0; i < NUM_DESCS; i++) {
+ desc_write(&priv->descs[i], hw_next,
+ (i == (NUM_DESCS - 1)) ? 0 : &priv->descs[i+1]);
+ }
+ priv->desc_free = &priv->descs[0];
+
+ /* initialize channels */
+ memset(&priv->rx_chan, 0, sizeof(struct cpdma_chan));
+ priv->rx_chan.hdp = priv->dma_regs + CPDMA_RXHDP;
+ priv->rx_chan.cp = priv->dma_regs + CPDMA_RXCP;
+ priv->rx_chan.rxfree = priv->dma_regs + CPDMA_RXFREE;
+
+ memset(&priv->tx_chan, 0, sizeof(struct cpdma_chan));
+ priv->tx_chan.hdp = priv->dma_regs + CPDMA_TXHDP;
+ priv->tx_chan.cp = priv->dma_regs + CPDMA_TXCP;
+
+ /* clear dma state */
+ soft_reset(priv->dma_regs + CPDMA_SOFTRESET);
+
+ for (i = 0; i < priv->data.channels; i++) {
+ __raw_writel(0, priv->dma_regs + CPDMA_RXHDP + 4 * i);
+ __raw_writel(0, priv->dma_regs + CPDMA_RXFREE + 4 * i);
+ __raw_writel(0, priv->dma_regs + CPDMA_RXCP + 4 * i);
+ __raw_writel(0, priv->dma_regs + CPDMA_TXHDP + 4 * i);
+ __raw_writel(0, priv->dma_regs + CPDMA_TXCP + 4 * i);
+ }
+ __raw_writel(1, priv->dma_regs + CPDMA_TXCONTROL);
+ __raw_writel(1, priv->dma_regs + CPDMA_RXCONTROL);
+
+ /* submit rx descs */
+ for (i = 0; i < PKTBUFSRX; i++) {
+ ret = cpdma_submit(priv, &priv->rx_chan, NetRxPackets[i],
+ PKTSIZE);
+ if (ret < 0) {
+ printf("error %d submitting rx desc\n", ret);
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void cpsw_halt(struct eth_device *dev)
+{
+ struct cpsw_priv *priv = dev->priv;
+ priv->data.control(0);
+}
+
+static int cpsw_send(struct eth_device *dev, volatile void *packet, int length)
+{
+ struct cpsw_priv *priv = dev->priv;
+ void *buffer;
+ int len;
+
+ if (!cpsw_update_link(priv))
+ return -EIO;
+
+ /* first reap completed packets */
+ while (cpdma_process(priv, &priv->tx_chan, &buffer, &len) >= 0)
+ ;
+
+ return cpdma_submit(priv, &priv->tx_chan, packet, length);
+}
+
+static int cpsw_recv(struct eth_device *dev)
+{
+ struct cpsw_priv *priv = dev->priv;
+ void *buffer;
+ int len;
+
+ cpsw_update_link(priv);
+
+ while (cpdma_process(priv, &priv->rx_chan, &buffer, &len) >= 0) {
+ NetReceive(buffer, len);
+ cpdma_submit(priv, &priv->rx_chan, buffer, PKTSIZE);
+ }
+
+ return 0;
+}
+
+static void cpsw_slave_setup(struct cpsw_slave *slave, int slave_num,
+ struct cpsw_priv *priv)
+{
+ void *regs = priv->regs;
+ struct cpsw_slave_data *data = priv->data.slave_data + slave_num;
+
+ slave->slave_num = slave_num;
+ slave->data = data;
+ slave->regs = regs + data->slave_reg_ofs;
+ slave->sliver = regs + data->sliver_reg_ofs;
+}
+
+int cpsw_register(struct cpsw_platform_data *data)
+{
+ struct cpsw_priv *priv;
+ void *regs = (void *)data->cpsw_base;
+ struct eth_device *dev;
+
+ dev = malloc(sizeof(*dev));
+ if (!dev)
+ return -ENOMEM;
+ memset(dev, 0, sizeof(*dev));
+
+ priv = malloc(sizeof(*priv));
+ if (!priv) {
+ free(dev);
+ return -ENOMEM;
+ }
+ memset(priv, 0, sizeof(*priv));
+
+ priv->data = *data;
+ priv->dev = dev;
+
+ priv->slaves = malloc(sizeof(struct cpsw_slave) * data->slaves);
+ if (!priv->slaves) {
+ free(dev);
+ free(priv);
+ return -ENOMEM;
+ }
+
+ priv->host_port = data->slaves;
+ priv->regs = regs;
+ priv->host_port_regs = regs + data->host_port_reg_ofs;
+ priv->dma_regs = regs + data->cpdma_reg_ofs;
+ priv->ale_regs = regs + data->ale_reg_ofs;
+
+ for_each_slave(priv, cpsw_slave_setup, idx, priv);
+
+ strcpy(dev->name, "cpsw");
+ dev->iobase = 0;
+ dev->init = cpsw_init;
+ dev->halt = cpsw_halt;
+ dev->send = cpsw_send;
+ dev->recv = cpsw_recv;
+ dev->priv = priv;
+
+ eth_register(dev);
+
+ cpsw_mdio_init(dev->name, data->mdio_base, data->mdio_div);
+
+ return 1;
+}
diff --git a/include/netdev.h b/include/netdev.h
index 96c7b9b..740213e 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -185,4 +185,33 @@ struct mv88e61xx_config {
int mv88e61xx_switch_initialize(struct mv88e61xx_config *swconfig);
#endif /* CONFIG_MV88E61XX_SWITCH */
+#ifdef CONFIG_DRIVER_TI_CPSW
+
+struct cpsw_slave_data {
+ u32 slave_reg_ofs;
+ u32 sliver_reg_ofs;
+ int phy_id;
+};
+
+struct cpsw_platform_data {
+ u32 mdio_base;
+ u32 cpsw_base;
+ int mdio_div;
+ int channels; /* number of cpdma channels (symmetric) */
+ u32 cpdma_reg_ofs; /* cpdma register offset */
+ int slaves; /* number of slave cpgmac ports */
+ u32 ale_reg_ofs; /* address lookup engine reg offset */
+ int ale_entries; /* ale table size */
+ u32 host_port_reg_ofs; /* cpdma host port registers */
+ u32 hw_stats_reg_ofs; /* cpsw hw stats counters */
+ u32 mac_control;
+ struct cpsw_slave_data *slave_data;
+ void (*control)(int enabled);
+ void (*phy_init)(char *name, int addr);
+};
+
+int cpsw_register(struct cpsw_platform_data *data);
+
+#endif /* CONFIG_DRIVER_TI_CPSW */
+
#endif /* _NETDEV_H_ */
--
1.7.1
More information about the U-Boot
mailing list